Virtual Home Theater (VHT) is a multimedia player and desktop mirroring VR software that simulate the audio channels as virtual sound objects or virtual speakers, delivering true 3D spatial audio in VR, replacing the old 'head-locked' stereo audio technology.
Since the SteamVR 2.0 update, when launching a non-VR application from Steam Library a theater screen from Steam will be displayed automatically inside VHT, over the already existing desktop screens from VHT.
You can deactivate this feature from Steam by changing the steam settings as:
set 'SteamVR Setting->Advanced Settings' to Show
set 'SteamVR Setting->Dashboard->Present Non-VR Application on Theater Screen Upon Launch' to Off
https://steamcommunity.com/app/989060/discussions/0/1608274347728620914/
